Table 3. Poisson regression: URI risk factors in adult cats.
| Variable | IRR | 95% Confidence interval | P value |
|---|---|---|---|
| Cat intake (ln) | 1.23 | 0.75–2.02 | 0.41 |
| Intake Housing Floor Space <6 ft2 | 1.00 | ||
| Intake Housing Floor Space 6 to <8 ft2a | 0.69 | 0.45–1.06 | 0.09 |
| Intake Housing Floor Space >8 ft2b | 0.078 | 0.06–0.10 | <0.0001 |
| Hiding Space in Intake Housing (Never) | 1.00 | ||
| Hiding Space in Intake Housing (Sometimes) | 7.29 | 3.04–17.50 | <0.0001 |
| Hiding Space in Intake Housing (Always) | 5.98 | 3.46–10.32 | <0.0001 |
| Mixed-Age Housing present | 1.00 | ||
| No Mixed-Age Housing | 1.89 | 0.78–4.58 | 0.16 |
| Number of Housing Moves (> 2 in first week of stay) | 1.00 | ||
| Number of Housing Moves (≤ 2 in first week of stay) | 0.19 | 0.14–0.25 | <0.0001 |
| Intranasal Vaccine Use (FVRCc) | 1.66 | 1.13–2.44 | 0.010 |
a0.56–0.74m2
b >0.74m2
c Feline viral rhinotracheitis (feline herpesvirus-1) and calicivirus